摘要:
A method for repairing pipes laid underground, such as gas pipes, consisting of a main supply pipe from which numerous distribution pipes branch off to supply the individual users, the method using resin to repair the main supply pipe and the distribution pipes from the inside while in their buried state.The repair method of this invention is characterized by the fact that, having repaired the main supply pipe and the distribution pipe in successive operations, whether the repairs to the main supply pipe and the distribution pipes have been done properly or not can be confirmed on completion of the repairs by carrying out sealage tests on the distribution pipes and the main supply pipe.
摘要:
It is intended to provide a pyrrole-imidazole polyamide type functional molecule having enhanced abilities of alkylating DNA and recognizing a sequence, compared with the existing functional molecules of this type, for a specific base sequence occurring on DNA. A hairpin polyamide having an alkylation site via a vinyl linker at the end of a pyrrole-imidazole polyamide. Drugs for inhibiting the expression of a specific gene and anticancer agents containing the above hairpin polyamide.
摘要:
A compound represented by formula (1): wherein R1 is a substituent represented by formula (2): wherein R2 is ═O or —NH2, with the proviso that when R2 is ═O, H is attached to the 1-position N of the pyrimidine ring, and the bond between the 1-position N and the 6-position C is a single bond; or a substituent represented by formula (3): wherein R3 is —OH, ═O, or —NH2, with the proviso that when R3 is —OH or —NH2, R4 is H; when R3 is ═O, R4 is —NH2; and when R3 is ═O, H is attached to the 1-position N of the purine ring, and the bond between the 1-position N and the 6-position C is a single bond.
摘要:
A process for amino acid derivatives shown by the below general formula (I): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms.) having an object to provide a process of the amino acid derivatives of the formula (I) and their synthetic intermediate, t-butoxycarbonylamino-ethylamine, whereby it requires no tedious procedure and is also good in yield, and its application to a mass production is easy, and to provide novel amino acid derivatives of the formula (IV), their synthetic intermediates, and a process thereof, characterized in that it comprises a step to obtain the amino acid derivatives shown by the general formula (I) by hydrolysis of compounds shown by the below formula (II): (wherein R1 has the same meaning as described above, and R2 means a straight chain or branched chain alkyl group with 1-4 carbon atoms.) as well as amino acid derivatives shown by the general formula (IV): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms, and n means any one of integers 1-11.), and a process for the amino acid derivative, characterized in that it comprises a reduction step of benzyloxycarbonyl-ω-amino acid derivatives.
摘要:
The invention provides a compound recognizing the minor group of hydrogen bonds between base pairs and being capable of forming a covalent bond with bases. The inventive compound can recognize a specific nucleotide sequence and can strongly bind to adjacent bases via covalent bonding, to regulate the expression of a DNA with the nucleotide sequence. The invention provides a DNA alkylating agent comprising a compound represented by the general formula I: wherein R represents a lower amyl group or a polyamide group; and X represents nitrogen or CH.
摘要:
The present invention relates to a lapping oil composition which is advantageously used in finish-grinding of a material to provide a high-quality grinding surface, without selective grinding, which is generally caused during lapping and polishing processes of the composite material. The lapping oil composition contains at least one acetylene glycol compound and preferably further contains at least one at least one phosphoric ester compound.
摘要:
A magnetic playback apparatus and method with which a PLL phase-locked to played-back data operates stably even when the magnetic tape on which the data is recorded is transported at a high speed of several hundred times the recording speed. During high-speed playback of a magnetic tape, the speed of the magnetic tape is detected and using this tape speed information the free-run frequency of a PLL 2 is corrected in correspondence with the azimuth angles of magnetic heads HO, HE. The rotational period of a drum servo 3 is also corrected using the tape speed information.
摘要:
An anti-piracy signal generating circuit for generating anti-piracy signal components on a video signal reproduced by a first video unit, the signal components being interleaved to a frequency f.sub.H in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly on the luminance signal, first color difference signal, and second color difference signal.
摘要:
A luminance signal Y and two color difference signals (R-Y), (B-Y) are separated from a color video signal. A color difference time division multiplex (TDM) signal is produced from the two color difference signals by a time base compression and time base multiplexing. A burst signal is added on the luminance signal and the color difference TDM signal as a time base information. The color difference TDM signal is recorded on an inner area of a disc. The luminance signal which has a wide signal band is recorded on an outer area of a disc which has a good frequency response characteristic. By separate recording of the two kinds of signals, a high resolution is obtained.
摘要:
The picture scanning and recording method of this invention permits the simplification of the manner of designation and input for the processing of picture pattern regions and line picture regions and the simplification of the processing circuit. The original picture is classified into plural types of regions, e.g., picture pattern regions, border tint regions, line picture regions, line picture tint regions or into a plurality of picture pattern regions of the same type. The preference of overlapped areas of the thus-classified regions are ranked. Based on such ranking, a picture image signal corresponding to the region having the highest ranking is selected in each of such overlapped areas.